https://www.skillshare.com/classes/How-to-Paint-a-Screaming-Mouth/1451933645

In this class you'll learn how the mouth changes to convey the expression of a scream. Kristy will guide students through the creation of a well-structured painting of the screaming mouth with convincing colors. We will begin by discussing the construction of the mouth, to get accurate structure. Then we will move to color and concentrate how to mix colors and finally how to add details like lip gloss and highlights. You can use any medium they like in this course. Kristy will be doing the demo in oils and will provide a suggested supplies list for those interested in using oils.  By the end of the course you will have a painting that you’re proud of as well as a solid understanding of how to paint the mouth in a screaming expression. The beginner will learn fundamental principles such as how to mix colors and render form modeling. The more advanced student will discover how to take their work to the next level and achieve the finish that they desire.